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Expanding gas streams

Question asked by Sascha Albrecht on Apr 18, 2016

I have an expanding gas stream in my fluid simulation.

The gas in the expansion is always very hot (1000 K or more) but the boundary condition is air at 392K.

It doesn't matter whether I'm using an pressure at the inlet or a mass flow.

Especially at pressures below atmospheric pressure that seems to be a problem.

Is there a good strategy to get the temperature right?

 

Thank you

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